Finite element calculation method for evaluating water erosion defect safety of turbine blade

• Main Authors: PAN SHAOPING, ZHAO HONGYU, CHENG XUELIANG, GUO KUIJUN, LIANG TIANFU, XU LINFENG, SHAO CHONGHUI, LIU YANG, ZHANG CHUNXIU, LI HONGLIANG, SEKI ATSUSHI, LI GUANGLEI, MA YILIANG, ZHENG HONGWEI, LI YUFENG, CHU SHIMING, WEI KUN
• Format: Patent
• Language: Chinese; English
• Published: 04.07.2023
• Subjects: CALCULATING; COMPUTING; COUNTING; ELECTRIC DIGITAL DATA PROCESSING; IMAGE DATA PROCESSING OR GENERATION, IN GENERAL; PHYSICS

The invention discloses a finite element calculation method for evaluating steam turbine blade water erosion defect safety, and belongs to the technical field of steam turbine blades. The method solves the problem that the water erosion defect limit of the turbine blade cannot be quantified in the prior art. The method is characterized by comprising the steps of 1, determining a blade water erosion defect area; 2, establishing a blade water erosion defect model; 3, performing finite element analysis on the blade water erosion defect model, and determining the upper limit of the blade water erosion defect size; 4, evaluating the safety of the blade water erosion defect structure, and determining the upper limit size of the defect depth and length of the blade model. According to the method, blade three-dimensional pneumatic flow field analysis and blade field operation records are adopted, a blade water erosion defect model is established, the strength and vibration safety of the blade are analyzed based on a